Post BugHerd task updates without hunting for the task

**Objective:** Add the comment `{comment}` to task `{task-number}` in the BugHerd project `{project-name}`, and attach the file at `{file-url}` when given.

**Step 1: Find the project**

Call `bugherd-get-projects` with `name.contains` set to `{project-name}`. If nothing matches, say so and stop. If more than one project matches, list their names and project-id values and ask which one is meant; do not guess. Use the matching project's project-id in every later call.

**Step 2: Find the task**

Call `bugherd-get-tasks` with `project-id` and `task-number`. If nothing comes back, try `bugherd-get-feedback` with the same filters. Take the task-id: the write tools need it, not the task number.

**Step 3: Confirm, then write**

Show the task title and what will be added, and wait for an explicit yes. Then:

* Call `bugherd-add-comment` once with `project-id`, `task-id` and `comment`.
* If `{file-url}` is given, call `bugherd-add-attachment-from-url` once with `project-id`, `task-id`, `url` and a `file-name` taken from the last part of the URL path (ask if the URL has no file name).

**Step 4: Report**

Confirm the comment, and give the attachment-id and download-url when a file was attached.

**Rules & Guidelines:**

* The only write tools this prompt may call are `bugherd-add-comment` and `bugherd-add-attachment-from-url`, each at most once.
* Do not change the task's status, severity or assignee.

**Validation:**

* If the task cannot be found, say so and stop.